OR gate output not HIGH despite one input at 1V

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khojka

Joined Jan 29, 2019
2
I'm currently making a school project that involves logic gates. I made this circuit right here: https://imgur.com/a/AH4JsxF
It's supposed to be an OR gate, however the output voltage only reaches 0.52V when input B is 1.02V. I expect the output to be high, what am I doing wrong?
 

AlbertHall

Joined Jun 4, 2014
10,542
The output voltage will always be one base emitter voltage drop less than the input so the results you see are exactly as expected.
 
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